Mechanical control mechanism



- @12,1938. H. s. w. Bom-GER am 2,123,298

MECHANICAL CONTROL MECHANISM Patented July l2, 1938 MECHANICAL CONTROL MECHANISM Hanns Stephan Wilhelm Bllinger and vWalter Moritz Alwin Gottschalck, Frankenthal-Pfalz, Germany, assignors to Klein, Schanzlin & Becker Aktiengesellschaft, Frankenthal, Germany ApplicationNovember 6, 1936, Serial No. 109,503 In Germany September19, 1935 6 Claims.

The present invention relates to a mechanism for operating a horizontally movable rod by means of a foot pedal, more particularly to a mechanism as specified in which said foot pedal 5 is alsoused for-controlling the gas supply to an internal combustion engine which drives a variable speed transmission in which two different speed transmissions can be set by mean's of said horizontally movable rod.

l An object of the present inventionis to provide a mechanism in which, by operating a foot pedal,

the fuel supply to an internal combustion engine as well as to a speed changing mechanism is controlled and any desired speed can be 'obtained l independently from the fuel control merely by operating said pedal and without manipulation of a handle or the like.

Another object of the present invention residesin the provision of a mechanism as set forth in the paragraph next above in which the operation of the pedal takes place in the conventional manner and no -unusual motions of the foot for operating the pedal, such as tilting and the like, are

required. Further and other objects of the present invention will be hereinafter set forth in the accompanying` specification and claims `and shown .in the drawing which, by way of illustration, shows what we now consider to be a preferred embodiment of our invention.

In the drawing: Fig. 1 is a diagrammatic layout of a mechanism according to the present invention.

Fig. 2 is a diagrammaticlayout of a modified mechanism according to the present invention.

Fig.l 3 is a diagrammatic layout of another modification of the present invention.

Referring more particularly to Fig. 1 of the drawing, I represents a lever to which a pedal I' is rigidly connected. To this lever, a gas throttle 80 vof a motor driving amotor car or rail car or the like is connected by means of link 60, `spring 6I, rod 62,'and crank 63.

of pedal I designated by letter A corresponds the gas supply almost completely throttled. The position of the pedal designated by .letter B coincides with the full load condition of the motor,

The position i to light running condition of the motor, i. e., with further depress the gas pedal from position B into position C. The gas throttle is thereby not further moved because its lever 63 touches abutment 63 and link 60 compresses spring 6I.

Rod 2 which is linked to lever I slides in a f, slide 4 which is rigidly connected to two-arm lever 5, 5' which lever swings about fulcrum 6.' When gas pedaly I is depressed and reaches position B, block 3 which is rigidly connected with rod 2 abuts slide 4 and moves lever 5, 5' in coun- 10 terclockwise direction. Arm 5 is provided With a toothed segment, 1 which is in mesh with gearV Wheel 8. To wheel 8, a shaft 9 is rigidly con' nected which carries disc I0 to Which pawl II is movably connected. Pawl II engages a toothv 15- of ratchet wheel I2 which is rigidly connected to shaft I4. Upon rotation of shaft 9 and disc I0,

ratchet wheel I2 and shaft I4 are also rotated and this against thetension of spiral spring 22 which is unwound at such operation. To the endv 2o of shaft'I4, a crank I5 is connected which carries crank pin I6. This pin slidably moves in slot l1 which is part of rod I8. To rod I8, fork 64 operating clutch engaging member 65 is connected which, in the position shown in Fig. 1, is 25 holding clutch 66 in engaged position. Clutch 66 consists substantially of two parts, one of y which is designated by numeral B0 and carries a toothed wheel 68 and clutch discs 8i, which are axially but not rotatably movable within part \\3o` 86. and rotates freely on shaft 61. The other part comprises friction discs 82, which are axially movable but not rotatable on shaft 61. Only when clutch 66 is engaged does said part carrying Wheel 63 rotate with shaft 61. Wheel 68 is con- 35 stantly in mesh with gear wheel 69 which is rigidly connected with shaft 10. To the latter, another toothed wheel 1I is rigidly connected, which is constantly in mesh with toothed rim 12 of that A part of clutch 13 which is rigidly `connected with 40 shaft 14. When clutch 66 is engaged, power is transmitted from shaft 61 by means of gear wheels 6B, 69, auxiliary shaft 10, and gear wheels 1I, 12, the latter forming part of clutch 13, to shaft 14. Upon rotation of crank I5 by 180 45 which takes place when pedal I' moves from position B to position C, slot I1, rod I8, and clutch engaging member 65 are moved to the right, whereby clutch 66 is disengaged and clutch 13 is engaged. Shaft 61 is then directly connected 50 with shaft 14 and the transmission is set for second speed. In this case, wheels 68, 69, shaft 10, and wheels 1I and 12 are in light running `condition. `Power is then transmitted from shaft 61 through elements 83, whichcorrespond to elements 8|, to elements 84, which correspond to elements 82 in clutch 66, to the shaft 14. Upon rotation of discs I8 and I2 by 90, notch 16 of rod I8 cooperates with ball 18, and clutch engaging member 65 is in neutral position. No power is then transmitted from shaft 61 to shaft 14. An abutment 28 is provided for lever 5 which limits the movement of pedal I beyond position C. v

If the operator now releases pedal I', lever I is pullei backwards by means of spring 2| which had been expanded when lever I was depressed. With lever I, rod 2 and with it block 3 are pulled upwards, whereby slide 4 follows block 3 because lever 5, 5' is turned in clockwise direction by tooth wheel.8 connected to shaft 3, which latter is turned counterclockwise by the recoiling spring 22. One end of spring 22 is connected to a sta tionary part 22 and the other end to disc I8. Ratchet wheel |2, which is held in position by means of spring I3, shaft I4, crank I5, rod I8, and clutch operating member 65 remain in position and clutch 13 remains engaged. .This all takes place when, upon clockwise movement of lever I, pedal I' reaches position B. If lever I is further turned in clockwise direction, lever 5 rests against abutment I 3 and block 3 leaves slide 4. The gas throttle then closes until it is almost fully closed when pedal I' is in the position marked A. i

If pedal I' is again depressed beyond position B, clutch operating member 65 is moved to the left, whereby clutch 13 is disengaged and clutch 66 engaged. Should the operator not be satised with the speed set by rod I8, he permits pedal I to move from position C back to position B and presses the pedal once more to position C; thereby the other speed is set. It may be desirable to indicate the position of rod I8 particularly when it is in a position which indicates neutral position of the clutch operating member 65. This can be accomplished by providing rod I3 with' notches. 15, 16, and 11 into which a ball 18 is resiliently pressed by means of a spring 19.

In the embodiment of the present invention which is shown in Fig. 2, instead of lever 5, 5 and segment 1 of the mechanism shown in Fig. 1. an axially movable rod 21 is used which is provided with a projection 26 which is engaged by the end of an arm 25 which is'rigidly connected to lever I. Pedal of the mechanism shown in Fig. 2 must be depressed against the tension of spring 2|'. Rod 21 is provided with a rack 24 which engages gear wheel 28 which corresponds to wheel 8 in Fig. 1. The movement of rod 21 to the right is limited by abutment 33 which corresponds to abutment I3 in Fig. 1. Movement of rod 21 to the left is hunted by abutment 38 which corresponds to abutment 28 in Fig. 1. Wheel 28 is rigidly connected with-shaft 23 to which an arm 38 is fixed which carries pawl 3|. When pedal I' is depressed, shaft 23 turns ounterclockwise and winds up spring 36. Pawl 3| engages ratchetwheel 32 which is provided with pin 33 which slidingly moves in slot 34 which is part t rod 35. Rod '35 corresponds to rod I8 in Fig. l,1 and may operate a gear changing member, for example, a clutch operating member as is shown in Fig. 1. To lever a gas throttle may be connected in the same manner as shown in Fig. 11I

Upon depression of pedal I' in Fig. 2 from position B to C, arm 38 and ratchet wheel 32 are turned by 180 "and rod 35 is pushed from its ,leftmost position, which is shown in Fig. 2, to its rightmost position. If pedal I' is depressed to a position which is intermediary B and C, then disc 32 is revolved by 90 only, and rod 35 is pushed to the intermediary or neutral position which is designated-by the letter N. Upon releasing pedal I', lever turns clockwise due to the action of s'pring 2|. Projection 26 and rod 21 follow arm 25 due to the action of spring 36 which then unwinds, whereas wheel 32 and rod 35 remain in position asis the case with wheel I2 and rod I8 at the same pedal operation. Ratchet wheel 32 is definitely held in position by means of plate spring 31 which engages one of its teeth.

In the embodiment of our invention according to Fig. 3, lever 48 corresponds to lever I in Fig. 1, rod 4| to rod 2, block 42 to biock3, slide 43 to slide 4, lever 44 to lever 5, abutments 53 and 59 to abutmentsIS and 28, respectively, and fulcrum 45 to fulcrum 6 of Fig. 1. Lever 44 carries a pawl 46 which is kept in engagement with ratchet wheel 48 by means of spring 41. To ratchet Wheel 48, a gear wheel 43 is connected which engages gear wheel 58 which is rigidly connected to shaft 5|. The latter carries a cam member 52 which, in the embodiment shown in Fig. 3, has the shape of a disc, the contour of which is in sliding engagement with lever 53 which is held to said disc by means of spring 55. The free end of lever 53 engages a notch-like part 56 of rod 54 and, when swinging about fulcrum 51, moves rod 54 axially. To rod 54, a gear changing means, for example, a clutch operating member as shown in Fig. 1

`may be connected; To lever 40, a gas throttle may be connected in the same manner as is throttle 88 in Fig. 1.

The mechanism shown in Fig. 3 operates as follows: when pressing lever 48 down against the tension of spring 2|" so that the pedal 48' moves from position A. to position B, rod 4| moves freely in slide 43. When the pedal reaches position B, block 42 abuts against slide 43 and lever 44 is pressed downwards against the action of spring 51. Pawl 46 then turns ratchet wheel 48 and tooth wheel 48 in counterclockwise direction, whereby wheel 58 and shaft 5| are turned clockwise. Disc 52 then swings over to the right also in clockwise direction followed by lever 53 and rod 54. When pressing pedal 48' from position B to position C', disc 52 is turned by 180 and rod 54 moves from its leftmost position to its rightmost position. By depressing lever 48 to a position which is intermediary B and C, the right end of lever 54 moves to the position designated by letter N, which is neutral position. When releasing pedal 48', lever 48, due to the action of spring 2|", moves clockwise followed by rod 4| and lever 44 due to the action of spring 51. Ratchet wheel 45 is held inposition by plate ,spring 58 which engages one ,of its teeth, and also shaft 5I and rod 54 remain in their position as does rod I8 in Fig. 1 when pedal I is released.

While we believe the above described embodiments of our invention to be preferred embodiments, we wish it to be understood that we do not desire to be limited to the exact details of design and construction shown and described, for obvious modifications will occur to a person skilled in the art.

What is claimed is:

1. A control apparatus comprising pedal means, actuating means, a one-,way coupling comprising a driving memberand a driven member, a first set of connecting xreans connected to and connecting said pedal means and 'said driving memmit only part of the motion of said pedal means to said operating means, and another one-way coupling interposed in said connecting means and in series with said iirst mentioned coupling with respect to the flow of the power 4exerted on said pedal means from said pedal means to said operating mean 3. A control apparatus comprising pedal means, fuel supply control means connected with said pedal means, speed changing means comprising operating means, -connecting means operatively interconnecting said pedal means and said operating means, said connecting means comprising a one-way lost-motion coupling adapted to transmit only part of the motion of said pedal meansl to said operating means, another one-way couplinginterposed in said connecting means and in series with said first mentioned coupling with respect to the now of power exerted on said pedal means from said pedal means to said operating' means, a member connecting said one-way lostmotion coupling with said other coupling, and

resilient means connected with said member and adapted to store up energy when said member is moved in one direction, due to the action of said pedal means, and to move said member in opposite direction independently 'from said pedal means by means of the stored up energy.

4. In a control apparatus, pedal means, a lost motion connection composed of two members, one

of said members being connected to said pedal, a one-way coupling having a driving member and a driven member, means connecting said driving member to the other member of said lost motion connection,` actuating means, means connecting the driven member of said one-way coupling with said actuating means, said drive and driven members of `said one-way coupling being so arranged that said first mentioned connecting means can move-in one direction independently from said second mentioned connecting means. n

5. In a control apparatus, pedal means, a lost motion connection composed of two members, one A,of said members being connected to said pedal, aone-way coupling having a driving member and a driven member, means connecting said driving member to the other member of said lost motion connection, actuating means, means y connecting the driven member of said one-way coupling .with saidactuating means, said drive and driven members of said one-way coupling being so arranged that said first mentioned connecting means can move in one direction independently from said second mentioned connecting means and power accumulating means connected with said -first mentioned connecting means and being adaptedto be loaded upon operation of said pedal means and to operate said first mentioned connecting means when said pedal means are released.

` 6. In a control apparatus, pedal means, a lost motion connection composed of two members,

one of .said members being connected to saidv pedal, a one-way coupling having a driving memberand a driven member, means connecting said driving member to the other member of said lost motion connection, actuating means, means connecting the driven member of said one-way coupling with said actuating means, said drive a'nd driven members of said one-way coupling being so arranged that said first mentioned'connecting means can move in one direction independently from said second mentioned connecting means, the member of said lost motion connection which is connected with said pedal being adapted to freely move for a predetermined distance before it engages the other member of said lost motion connection when said pedal means are actuated, whereby said pedal means can be moved fora predetermined distance before said actuating means are actuated. u

HANNS STEPHAN WILI-IEIM BOLLINGER. WALTER. MORITZ mALWIN GO'ITSCHALCK. 

